Macquarie University

Macquarie Research Ltd.

Other

Lighthouse Technologies Pty Ltd.

Avastra Ltd.

James Austin Piper

Helen Margaret Pask

Peter Dekker

Richard Paul Mildren

David James Spence

Earl R Owen

Russell Connally

Robert John Carman

Alexei Stanco

Hamish Ogilvy

Peter Maitz

Rodney I Trickett

Judith M Dawes

Daniel John Brown

Michael John Withford

Mark D Ainsworth

A continuous wave Raman laser for producing visible laser output comprising: a resonator cavity; at least a first reflector and a second reflector said first and second reflectors being located at opposite ends of the resonator cavity; a laser gain medium located in the resonator cavity for generating a continuous wave fundamental beam which resonates within the resonator cavity when pumped by a pump beam from a pump source external to the resonator cavity; a solid Raman-active medium positioned in the resonator cavity for Raman shifting the fundamental beam to produce a continuous wave Raman beam which resonates within the resonator cavity; and a non-linear medium positioned in the resonator cavity for frequency converting the continuous wave Raman beam to a converted wavelength to produce a continuous wave converted beam.

Continuous-wave laser

A fluorescence detection system comprises a light source (), dichroic mirror (), excitation port (), emission port (), and a detector. The light source () is, for example, a pulsed ultraviolet LED, with a light emission that decays sufficiently rapidly to permit gated detection of fluorescence from a fluorescently-labelled species, at a time when it is distinguishable from autofluorescence. The detector is, for example, an electron multiplying CCD, with high gain on-chip amplification. A circuit () may be used to control a repeating cycle of (i) generation of a 20-200 microsecond UV. pulse; (ii) a gate delay of 1-5 microseconds; and (iii) a 10-800 microsecond detection period. This allows time-resolved-fluorescence-microscopy with real time or near real time operation.

Fluorescence detection

The invention provides a laser system () wherein the output may be selected from two or more different wavelengths of output laser light. The system () comprises a laser capable of having at least two different wavelengths of laser light resonating in the cavity () simultaneously. One of the frequencies is generated by a Raman crystal () which shifts the frequency of light generated by the lasing medium (). A tunable non-linear medium (), such as LBO, is provided in the cavity for selectively frequency converting at least one of the at least two different wavelengths of laser light. The conversion may be SHG, SFG or DFG for example. A tuner () is provided to tune the non-linear medium to select the particular wavelength to convert. Temperature tuning or angle tuning of the non-linear medium can be used. A Q switch () may also be provided in the cavity. The output laser beam can be used for treatment, detection or diagnosis of a selected area on or in a subject, and can be used in opthalmological and dermatological fields.

Selectable multiwavelength laser for outputting visible light

A substantially solid biomolecular solder for joining tissue comprising a partially denatured biomolecule. The solder can be formed into shapes to suit the needs of a user. The invention also relates to methods for joining tissue and methods for preparing the solder.

Method of tissue repair II

The present invention relates to a stable solid-state Raman laser, the solid-state Raman laser including a resonator cavity defined by at least two reflectors, a laser material located in the resonator cavity and capable of generating a cavity laser beam which propagates within the resonator cavity, a solid Raman medium located in the resonator cavity for shifting the frequency of the cavity laser beam to produce a Raman laser beam which propagates within the resonator cavity; and an output coupler for coupling and outputting the Raman laser beam from the resonator cavity, wherein at least one parameter selected from the group consisting of the position of the laser material relative to the position of the Raman medium in the cavity, the length of the cavity and the curvature of at least one of the reflectors, is selected such that changes in the focal lengths of both the laser material and the Raman medium as a result of thermal effects in the laser material and the Raman medium during operation of the laser do not substantially cause instability in the power of the output Raman laser beam. A method of maintaining stable operation of a solid state Raman laser is also described.

Stable solid state raman laser and a method of operating same

There is disclosed a metal vapour laser comprising a discharge tube having a buffer gas therein and operating at high temperature, the buffer gas including a laser output power enhancing substance in an amount sufficient to substantially increase the power output of the laser. There is also disclosed a process for operating a metal vapour laser of the invention.

Metal vapour laser

Wavelength locked laser light source

Photoradiation method and arrangement

Growing community of inventors

Huntleys Cove, Australia

James Austin Piper